STEPHEN C OLSON
Engineering in Norfolk, MA

4810166, Mar 7, 1989

Aug 3, 1987

7/080791

Paul A. Sawizky - Norwood MA
Stephen C. Olson - Norfolk MA
Ole H. Midttun - Walpole MA

Bird-Johnson Company - Walpole MA

B63H 308, B63H 304

416167

A controllable pitch marine propeller comprises a hub body carrying a plurality of propeller blades for rotation about pivot axes disposed radially of the hub axis, a force rod extending into the hub body from the propeller shaft, and a cross-head affixed to the force rod and coupled to each propeller blade by a pin and slideway such that the propeller pitch is controlled by fore and aft movements of the force rod. The hub body has a tubular mount spigot that receives the aft end of the shaft with the shaft and mount spigot terminating aftward of the pivot axes of the blades. The cross-head is generally cup-shaped, having a base portion affixed to the force rod aftward of the pivot axes of the blades and a tubular portion extending forewardly from the base portion and surrounding aftward portions of the spigot in telescoping relation. The cross-head in supported in plain bearing relation by the hub body for fore and aft movements.

5145318, Sep 8, 1992

Oct 2, 1991

7/769575

Stephen C. Olson - Norfolk MA

Bird-Johnson Company - Walpole MA

B63H 304, B63H 2334

416167

A controllable pitch marine propeller includes a hub body having a forward section provided with holes for bolts and locating and torque pins and a frontal surface that mates with a hub flange and an internal flange that defines an annular cavity and receives a cup-shaped cross-head. A hub flange and propeller shaft assembly comprises separate hub flange and shaft members joined by at least one weldment formed in a tapered weld cavity and protected by a liner shrink-fitted on the perimeter of the hub flange and a removable plate sealed to the hub liner and the shaft liner.

2003019, Oct 16, 2003

Apr 11, 2002

10/120929

Stephen Olson - Norfolk MA, US

B02C019/06

241/039000

A fluid-energy mill includes a one-piece manifold defining a grinding chamber, a gas inlet, a feed inlet, and a feed outlet. The fluid-energy mill includes a cover for enclosing the grinding chamber. The manifold defines a non-circular groove around the grinding chamber, and a seal is positioned within the groove. The grinding chamber is cycloid-shaped, and the feed inlet is positioned such that feed enters the grinding chamber tangent to a circle larger than a diameter of the grinding chamber. The manifold defines a protective pocket and a barrier at a region where feed enters the grinding chamber. The feed inlet includes a feed gas inlet, a feed particle funnel, and a venturi. An intersection of the feed gas inlet and the feed particle funnel form an elliptical hole.

7422167, Sep 9, 2008

Nov 26, 2003

10/721241

Stephen C. Olson - Norfolk MA, US

Sturtevant, Inc. - Hanover MA

B02B 1/00, B02B 5/02, B02C 11/08, B02C 21/00

241 39, 241 5, 241 38, 2412853

A fluid-energy mill for size reduction of a material includes a manifold defining a grinding chamber having a first radius extending from a center of the grinding chamber, a gas inlet, a feed inlet, and an outlet. The feed inlet is positioned such that the material enters the grinding chamber tangent to a second radius extending from the center and larger than the first radius. The fluid-energy mill includes a cover for enclosing the grinding chamber. The manifold defines a non-circular groove around the grinding chamber, and a seal is positioned within the groove. The grinding chamber is cycloid-shaped. The manifold defines a protective pocket and a barrier at a region where the material enters the grinding chamber. The feed inlet includes a feed gas inlet, a material funnel, and a venturi. An intersection of the feed gas inlet and the material funnel form an elliptical hole.